Polymer Engineering and Science · 2012 · 23 citations · 41 references
Natural SciencesChemical EngineeringMaterials SciencePolymer ChemistryPolymer EngineeringPolymer MaterialsCrystallization ProcessesPolymer CharacterizationPolymer CrystallizationPolymer Physical ChemistryPolymer ThermodynamicsThermal Properties Of MaterialsAvrami EquationAvrami KineticsCrystallizationCrystallization BehaviorCrystallization KineticsIsothermal CrystallizationIsothermal KineticsPolymer Crystallization Kinetics
Abstract The isothermal crystallization kinetics and melting behaviors after isothermal crystallization of poly(butylene terephthalate) (PBT) and poly(butylene terephthalate‐ co ‐fumarate) (PBTF) containing 95/5, 90/10, and 80/20 molar ratios of terephthalic acid/fumaric acid were investigated by differential scanning calorimetry. The equilibrium melting temperatures of these polymers were estimated by Hoffman–Weeks equation. So far as the crystallization kinetics was concerned, the Avrami equation was applied and the values of the exponent n for all these polymers are in the range of 2.50–2.96, indicating that the addition of fumarate does not affect the geometric dimension of PBT crystal growth. Crystallization activation energy (Δ E ) and nucleation constant ( K g ) of PBTF copolymers are higher than that of PBT homopolymer, suggesting that the introduction of fumarate hinders the crystallization of PBT in PBTF. POLYM. ENG. SCI., 2013. © 2012 Society of Plastics Engineers
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Kinetics of Phase Change. I General Theory
Melvin Avrami · The Journal of Chemical Physics · 1939 · 11.2K citations